143585857381 has 4 divisors (see below), whose sum is σ = 148217659264. Its totient is φ = 138954055500.

The previous prime is 143585857367. The next prime is 143585857397. The reversal of 143585857381 is 183758585341.

143585857381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143585857381 - 2¹³ = 143585849189 is a prime.

It is a super-2 number, since 2×143585857381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143585857301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2315900895 + ... + 2315900956.

It is an arithmetic number, because the mean of its divisors is an integer number (37054414816).

Almost surely, 2^143585857381 is an apocalyptic number.

It is an amenable number.

143585857381 is a deficient number, since it is larger than the sum of its proper divisors (4631801883).

143585857381 is an equidigital number, since it uses as much as digits as its factorization.

143585857381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631801882.

The product of its digits is 16128000, while the sum is 58.

The spelling of 143585857381 in words is "one hundred forty-three billion, five hundred eighty-five million, eight hundred fifty-seven thousand, three hundred eighty-one".